danqha0

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Full-stack developer · Hanoi, Vietnam 21.0285° N / 105.8542° E

Dang Hao I build reliable products where web, blockchain and automation meet.

I take software from an ambiguous requirement to a maintainable release—working across interfaces, services, data, and emerging technology when the product calls for it.

View experience View resume Email me
01 / Status

Open to thoughtful teams, technical collaborations, and product work with real ownership.

02 / Now

Full-stack Developer · Zinza Technology

03 / Base

Hanoi, Vietnam

01

Expertise

Useful breadth, grounded in delivery.

My work spans the product surface and the systems behind it. I focus on clear decisions, operational reliability, and code another engineer can continue.

01

Product engineering

Responsive interfaces and maintainable application flows, connected cleanly to the services behind them.

Next.js · React · Svelte · TypeScript
02

Backend & data

Service design, data modeling, and production maintenance with a bias toward understandable systems.

Node.js · NestJS · PostgreSQL · MongoDB
03

Blockchain integration

Smart-contract integration and on-chain flows treated as part of the product—not an isolated demo.

Solidity · Web3 · Rust
04

Security & AI

Endpoint data protection on Linux, plus prompt design, model evaluation, failure analysis, and structured feedback loops.

Linux · DLP · AI evaluation
02

Experience

A practical path through product engineering.

Professional work across full-stack products, Web3, endpoint security, AI model evaluation, game development, and workflow automation—from implementation through production support.

01

Full-stack Developer

Zinza Technology / Full-time · On-site · Hanoi, Vietnam

  • Build and maintain production applications across responsive frontends and scalable backend services.
  • Design APIs and background processing; integrate databases, Redis, search services, and third-party platforms.
  • Deliver multichain Web3 features spanning smart contracts, account abstraction, event processing, digital rewards, and cross-chain flows.
  • Develop endpoint DLP with policy enforcement, sensitive-content detection, network traffic control, and Linux system components.
  • Improve AI outputs through prompt design, model testing, evaluation, failure analysis, and structured feedback.
Next.jsNode.jsPostgreSQLWeb3DLPLinuxAI
02

JavaScript Developer

Zinza Technology / Internship · On-site · Hanoi, Vietnam

  • Completed a JavaScript web development internship focused on building application features with React.js and Node.js.
JavaScriptReact.jsNode.js
03

Unity 2D Developer

HN Technology / Part-time · On-site · Hanoi, Vietnam

  • Developed 2D game features in Unity and C#, translating team concepts into functional gameplay aligned with the technical lead’s requirements and product vision.
UnityC#Game systems
04

Unity 2D Developer

HN Technology / Internship · On-site · Hanoi, Vietnam

  • Studied game architecture, development workflows, and game design principles while building small Unity projects to apply the concepts in practice.
UnityC#Game architecture
05

Software Developer

Sellclone / Part-time · On-site · Hanoi, Vietnam

  • Designed and built Android automation tools tailored to specific user and device requirements.
  • Maintained web applications with a focus on performance and security, and supported customers across an established user base.
Node.jsC#AndroidWeb automation
03

Selected work

The engineering scope behind the job titles.

Public case studies are being prepared. These summaries describe verified areas of work without exposing client or company details.

01
Application engineering

Production web systems

End-to-end web application work covering interfaces, service logic, data modeling, maintenance, and production support.

Case study in preparation
Next.jsNode.jsPostgreSQL
02
Product integration

Blockchain delivery

Connecting smart contracts and on-chain interactions to understandable application workflows and operational requirements.

Case study in preparation
SolidityWeb3Smart contracts
03
Security engineering

Endpoint data protection

Policy-driven DLP capabilities combining sensitive-content detection, network controls, and Linux system components to reduce unauthorized data exfiltration.

Case study in preparation
Endpoint DLPLinuxNetwork control

Project names, live demos, architecture notes, and measurable outcomes can be added here when they are ready for publication.

04

About

Curious by default, disciplined in execution.

I graduated from the Academy of Cryptography Techniques with an engineering background in information technology. That systems foundation now informs how I build web products: understand the boundary conditions, keep the interface clear, and leave the implementation easier to operate than I found it.

Education

Academy of Cryptography Techniques

Engineer’s degree · Information Technology

2019 — 2024

Working principles

  1. 01Clarity before complexity
  2. 02Ship in maintainable increments
  3. 03Measure before optimizing

Contact

Have a useful problem to solve?

For roles, collaborations, or a technical conversation, email is the most direct way to reach me.

Start a conversation

Dang Hao / danqha0

Full-stack Developer · Hanoi, Vietnam